HF

June 22, 2020 -- The V4Chat Program has been available for download here for several years. The program was created as a testbed for the experimental V4 protocol/mode and served it's purpose well, but it did gain popularity after the testing program among Ham experimenters as a fun program for on-air chats. Because of the Winlink Team's limited resources, our development and use of improved modes, and the decline in the on-air use of V4, we have decided to deprecate both the program and mode. V4Chat support will no longer be available from the Winlink Team. Users who have registered the program within the last six months are eligible for a refund from ARSFI by simply requesting it by email and including your callsign and full name. Users interested in a similar chat program using a modern protocol should look at VARA Chat, available at https://rosmodem.wordpress.com.

--The Winlink Development Team

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The Amateur Radio Safety Foundation introduces the IONOS Channel Simulator, an audio-processing radio path simulator that models common HF and VHF/UHF propagation channels. It is intended to accelerate modem and protocol design, analysis, optimization and comparison, but has other uses as well. BUY IONOS

More.

December 5, 2018--Today the ARSFI board filed with the FCC a comprehensive response to the online and media campaign that Theodore Rappaport has been leading to get the FCC to dismiss the pending Notice of Proposed Rule Making (Docket No. 16-239). The proposal would eliminate the current 300 baud limit on HF digital transmissions. The original ARRL proposal would replace it with a 2.8 kHz bandwidth limitation. We're in favor of the NPRM plus the ARRL's bandwidth limit (for now, please read our paper) for many reasons, mostly because the advancement of the radio art is impeded without it, but for most Winlink stakeholders it will allow Pactor 4--finally--in the USA. New, faster and better protocols will be close behind.

Rappaport is spreading unrelated emotional fire, claiming that ARC protocols and similar wide-band connected digital modes and modes that are hard, expensive (or need proprietary hardware, firmware or software) to intercept communications on-the-air need to be removed from the amateur bands. He says these modes encourage crime, terrorism and are a threat to national security. His arguments would have the FCC remove Winlink, D*Star, Fusion, and all 'connected' modes not easily intercepted on-air by unskilled operators without a proprietary component in the monitoring equipment—before addressing the 300 symbols/second NPRM. He would set amateurs back 40 years or more with respect to the radio art and digital techniques. We don't have to say how devastating the consequences would be if Winlink and all others using similar modes disappeared from the ham bands.

You can download and read the letter we wrote to FCC Chairman Ajit Pai, our response paper, and Rappaport's two recent letters to the FCC. Make your own decision, but make it an informed decision!

If you have a stake in this, we urge you to please immediately file a comment on the ECFS. It's easy: Click here. Time is of the essence. You don't have to write a masterpiece. An 'express' comment that endorses the ARSFI filing is all that's needed.

Also, spread the word. Send a link to this page to all you know who care, especially those you know in leadership positions with emergency management or government agencies, the ARRL, and organizations and agencies that have a stake in Winlink. Let them know, and ask them to take a few moments to put their opinion on the record, or simply say you agree with us with a reference to our filing.

The ARSFI Board of Directors
Winlink Development Team